With a magic word and a flourish, Melissa finished the spell. Nothing happened. The purple pentagram painted carefully on her wooden floor didn't glow, and a portal to a mystical realm didn't appear. Especially disappointing, tentacles didn't burst out of the ground to rip her clothes off and fuck her senseless. Ah, well. She looked down at her outfit, specifically chosen thanks to a friend's recommendation to appease the demon she was summoning. She wore a blood red corset, which cinched her waist a little and propped her tits up beautifully. A black mini-skirt came with it, going down just to her mid-thighs, where it met long black stockings. She wore no panties (hence the wet spot on the floor that grew as she set this up) but added on a subtle black choker on her neck.
With a sigh, she made to get up, but suddenly - a glow! A soft light began emanating from below, which Melissa stared at in wonder from her position on the very edge of the ritual. The wood rippled and began to glow as well, until a sheen of something unknowable replaced it - a doorway to another world. She knew little about what was behind it. The spellbook she'd borrowed from the forbidden section of the library gave scant information: just detailed instructions on the ritual and a few warnings. The rest Melissa gathered from rumors passed down through the Royal Academy for Witches. She saw masses of shapes roiling beneath the surface, and leaned over to get a closer look. She was on her elbows and knees, bent over, when the first one appeared from the very center near her face. It was small and red, no more than an inch at its thickest, with a rounded tip. As it rose it twisted and waved through the air, as if nervously exploring. It was almost... cute?
Melissa licked it, and the tentacle jolted excitedly. The texture was what she expected, and the reptile-like skin was coated with a smooth wetness. To her pleasant surprise, the taste was far from neutral or even repulsive. In fact, it was delicious! She licked it once, twice more, and when she opened her mouth expectantly the tentacle eagerly shot in. Melissa bobbed her head as she sucked in its flavor, and when more tentacles started emerging from the ground, gently wrapping around her shins and forearms as she knelt on the floor, she let them. She knew the substance in her mouth must be an aphrodisiac at the very least, but she wasn't quite sure whether this creature was simply helping her get a couple of satisfying orgasms, or if it was flooding her body with demonic pheromones with the purpose of pushing her body past its limits and literally fucking some of Melissa's magical energy out of her. Oh, well.